/* styles.css — global styles (clean, mobile-friendly). Change colors via the :root variables below. */
:root{
  --bg:#f7f8fb; --card:#ffffff; --ink:#1f2430; --muted:#5b6472;
  --brand:#6a5acd; --brand-d:#4b3fb0; --line:#e7e9f0; --accent:#eef0fb;
  --ok:#2e9e6b; --warn:#e2a100; --radius:14px; --maxw:760px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,"Segoe UI",Roboto,"Helvetica Neue","Microsoft YaHei",sans-serif;
  line-height:1.6;font-size:17px}
a{color:var(--brand-d);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 18px}
header.site{background:#fff;border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:58px}
.logo{font-weight:800;color:var(--brand-d);font-size:18px}
nav a{margin-left:16px;color:var(--muted);font-size:15px}

/* Hero */
.hero{text-align:center;padding:54px 0 26px}
.hero h1{font-size:34px;line-height:1.25;margin:0 0 12px}
.hero p.sub{font-size:18px;color:var(--muted);margin:0 auto 22px;max-width:560px}
.btn{display:inline-block;background:var(--brand);color:#fff;font-weight:700;
  padding:14px 30px;border-radius:999px;border:0;font-size:17px;cursor:pointer}
.btn:hover{background:var(--brand-d);text-decoration:none}
.btn.secondary{background:#fff;color:var(--brand-d);border:1.5px solid var(--brand)}
.note{font-size:13px;color:var(--muted);margin-top:10px}
.proof{font-size:14px;color:var(--muted);margin-top:14px}
.proof b{color:var(--ink)}

/* sections / cards */
section{padding:26px 0}
h2{font-size:24px;margin:0 0 14px}
h3{font-size:19px;margin:18px 0 8px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;margin:14px 0}
.muted{color:var(--muted)}
ul.clean{padding-left:1.1em;margin:8px 0}
ul.clean li{margin:6px 0}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:8px}
.steps .step{background:var(--accent);border-radius:12px;padding:14px;text-align:center}
.steps .step b{display:block;font-size:15px;margin-top:6px}
.steps .num{width:30px;height:30px;border-radius:50%;background:var(--brand);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;font-weight:700}

/* quiz */
.q{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:12px 0}
.q .qt{font-weight:600;margin-bottom:12px}
.scale{display:flex;gap:8px;flex-wrap:wrap}
.scale label{flex:1;min-width:84px;text-align:center;border:1.5px solid var(--line);
  border-radius:10px;padding:9px 6px;font-size:13px;color:var(--muted);cursor:pointer;user-select:none}
.scale input{display:none}
.scale input:checked + span{font-weight:700}
.scale label:has(input:checked){border-color:var(--brand);background:var(--accent);color:var(--brand-d)}
#progress{position:sticky;top:0;background:var(--bg);padding:8px 0;z-index:5}
.bar{height:8px;background:var(--line);border-radius:999px;overflow:hidden}
.bar>i{display:block;height:100%;width:0;background:var(--brand);transition:width .25s}

/* result */
#result{display:none}
.result-card{background:linear-gradient(135deg,#6a5acd,#4b3fb0);color:#fff;border-radius:16px;padding:24px;text-align:center}
.result-card h2{color:#fff;font-size:26px;margin:6px 0}
.result-card .one{opacity:.9}
.quad{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:16px 0}
.metric{background:rgba(255,255,255,.15);border-radius:10px;padding:10px}
.metric .v{font-size:22px;font-weight:800}
.metric .k{font-size:12px;opacity:.85}
.share{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:16px}

/* trust / footer */
.trust{font-size:14px;color:var(--muted)}
.refs{font-size:13px;color:var(--muted)}
.refs li{margin:4px 0}
.disclaimer{background:#fff8e6;border:1px solid #f0e2b8;border-radius:12px;
  padding:14px;font-size:13px;color:#6b5a14}
footer.site{border-top:1px solid var(--line);background:#fff;margin-top:30px;padding:24px 0;color:var(--muted);font-size:14px}
footer.site a{color:var(--muted)}

@media(max-width:620px){
  .hero h1{font-size:27px}
  .steps{grid-template-columns:1fr}
}